I'm using Excel 2013 on my surface with a pen. I've found that it's very handy to walk around while using the pen to fill in a spreadsheet of readings. However, every time I move to a new cell and begin writing with the "pen keyboard", the first stroke disappears and the interpretation (almost always wrong) is placed in that cell. I then have to rewrite the first stroke and the rest of what I wanted. Example: I want to enter "6.5" in a cell. I pen 6 and lift my pen. The 6 disappears and something (maybe a 6 or maybe some other character) appears in the cell. Then I have to rewrite the 6 and I am able to write the ".5". It's very annoying to have to constantly rewrite the first character.

It seems to work OK in excel 2016. I do not normally use the "pen keyboard", prefer the onscreen num keypads. I liked the handwriting input on a samsung slate tablet which also had the num & math symbols on it, resizable too, worked with excel 2010.